CAM PL YLOBACTERIOSIS (Yibriosis) is a venereal disease of cattle caused by Campylohacter (Vibrio) fetus subsp. fetus. The infection, isolated to the genital tract, results in infertility and early embryonic death. Abortion occurs in a small percentage of cattle. The disease is transmitted by coitus under natural conditions and may also be spread by the use of contaminated semen in artificial insemination and by contaminated instruments. The best method to bring the disease under control is to use artificical insemination. Semen for this purpose should either be from known uninfected bulls or treated with antibiotics. 1 When natural service is employed, as in large beef herds, vaccination is recommended.